Cement board for drywall partition system: 1) totally asbestos free. 2) standard specification: 1220x2440mm, 1200x2400mm Cement board for drywall steel partition system:Cement board is ... Ltd.www.cnebp.comWe are solution of construction: structure frame, stud and track, furring channel, T grid, ceiling grid, metal ceiling, ... structure, C channel, U channel. Cement board for drywall partition system